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BACKGROUND: Weight change trajectories after weight-loss surgery may vary significantly.

OBJECTIVES: This study evaluated the weight trajectories of Roux-en-Y gastric bypass (RYGB) patients and identified the distinct clinical, behavioral, and demographic features of patients by trajectory.

SETTING: Data from 2918 RYGB patients from a comprehensive medical center between January 2004 and November 2016 were included.

METHODS: This retrospective, observational study used data for RYGB patients up to year 7 postsurgery. Group-based trajectory models were fitted for percentage weight change. Variables evaluated by trajectory included age, sex, diagnoses, medications, smoking, presurgical body mass index, preoperative weight loss, and early postoperative weight loss.

RESULTS: Of 3215 possible patients, 2918 (90.8%) were included (mean age = 46.2 ± 11.2 yr, body mass index = 46.9 ± 7.9 kg/m

CONCLUSION: Select clinical, demographic, and behavioral factors may increase or decrease the chance for better weight loss after RYGB.

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Surgery for Obesity and Related Diseases

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This article was published in Surgery for Obesity and Related Diseases.

The published version is available at

Copyright © 2018 American Society for Bariatric Surgery. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.